On Tuesday 05 May 2009 20:42:06 Hoyt Koepke wrote:
> > it is a bit disturbing though:
> > auto foo = Bar !(3, Baz, 42);
> > auto bar = Foo !(z);
> >
> > it is hard to not think of these statements as negating something
> > (probably especially the second one ?)
> > I wish D had chosen @ or $ instead of !.
>
> Perhaps, but isn't it true that every language has slightly confusing
> stuff when first considered? Whitespace in python, < > for template
> stuff in C++, [] notation for buffers in cython (I've gotten used to
> it fine, and don't mind it now, but it did make me to do a few
> double-takes at first). What I like about D's syntax is that it's
> easy to pick out !( ) as type arguments to a function, class, method,
> etc. and ( ) for the regular arguments. What I have found to be nice
> (and granted, I haven't done much D programming recently) is that type
> parameters and regular parameters follow similar syntax, by intention.
> I've found that templating stuff in D is an amazingly nice experience
> (C++ just stinks in comparison) as once I've got my head around what
> can and can't be done, the syntax is very intuitive.
in fact, I am not really sure I am buying that this:
auto foo = Foo !(T1, T2, T3)(arg1, arg2);
is really cleaner/clearer than:
auto foo = Foo (T1, T2, T3)(arg1, arg2);
that is what we do in python/PyROOT (the main python-to-C/C++ module we use in
my field (High Energy Physics)):
import ROOT
cls =ROOT.std.vector(double) # instantiates std::vector<double>
data = cls()
assert hasattr(data, 'size')
my_data = ROOT.std.vector('MyNS::MyClass')()
my_data.push_back(...)
assert isinstance(my_data[0], ROOT.MyNS.MyClass)
ROOT.std.vector being just a function returning classes, by type or by (C++)
class name...
cheers,
sebastien.
--
#########################################
# Dr. Sebastien Binet
# Laboratoire de l'Accelerateur Lineaire
# Universite Paris-Sud XI
# Batiment 200
# 91898 Orsay
#########################################
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